Logic Masters Deutschland e.V.

A Walk Across Nine Hearts

Rules:

Sudoku: Place the digits 1–9 so that each row, column, and 3×3 box contains each digit exactly once.

Core digits: The digit in the centre cell of each 3×3 box is that box’s core digit. All nine core digits are different.

Path: Draw a single, non-branching path that moves orthogonally from cell to cell. It starts in the box whose core digit is 1, then passes through all other boxes in increasing core order (2, 3, …, 9), and ends in the box whose core digit is 9. Each box may be entered at most once and exited at most once by the path, and every pair of consecutive cells along the path must contain non-consecutive digits.

Red dot: The red dot marks a border segment that the path may not cross.

Core count: In each box, the path must occupy exactly as many cells as that box’s core digit.

Between lines: All digits on a between line are strictly between (in value) the two digits in the circled endpoints.

Skyscrapers: Each digit in the grid represents the height of a building in its cell. Taller buildings obstruct the view of shorter ones behind them. Clues outside the grid give the number of buildings visible from that vantage point in the clue’s row or column.

Kropki: A white dot between two cells means those digits are consecutive.

Cages: Digits in a cage sum to the number shown in the cage’s top-left corner.

Greater-than sign: A “greater-than” symbol between two orthogonally adjacent cells indicates that the digit on the open side of the symbol is greater than the digit on the pointed side.

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Happy solving!